A study is made of a scheme providing spectrally pure, low hydrogen flows into a high-vacuum chamber through the use of a palladium membrane with a working surface of 20 cm(2) and ethyl alcohol vapors (scheme combining the processes of hydrogen generation and admission). It is demonstrated that at an optimum alcohol vapor pressure and a membrane temperature of 973 K this scheme can provide specific hydrogen flows of about 5 x 10(-2) Torr.1/s cm(2). The hydrogen permeability is limited in this case by the processes occurring at the entrance surface of the Pd-membrane.